oj.uz

Submission #1085182

# Submission time Handle Problem Language Result Execution time Memory
1085182 2024-09-07T16:39:28 Z elotelo966 Election (BOI18_election) C++17
28 / 100
 50 ms 10644 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define OYY LLONG_MAX
#define mod 998244353
#define faster ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define FOR for(int i=1;i<=n;i++)
#define mid (start+end)/2
#define lim 500005
#define fi first
#define se second

array<int,4> bos;

int arr[lim];

int sum[4*lim],ans[4*lim],le[4*lim],ri[4*lim];

inline void build(int node,int start,int end){
	if(start==end){
		sum[node]=le[node]=ri[node]=ans[node]=arr[start];
		ans[node]=max(ans[node],0ll);
		return ;
	}
	build(node*2,start,mid),build(node*2+1,mid+1,end);
	sum[node]=sum[node*2]+sum[node*2+1];
	le[node]=max(le[node*2],sum[node*2]+le[node*2+1]);
	ri[node]=max(ri[node*2+1],sum[node*2+1]+ri[node*2]);
	ans[node]=max({ans[node*2]+sum[node*2+1],ans[node*2+1]+sum[node*2],le[node*2]+ri[node*2+1],0ll});
}

inline array<int,4> query(int node,int start,int end,int l,int r){
	if(start>end || start>r || end<l)return bos;
	if(start>=l && end<=r){
		array<int,4> tut;
		tut[0]=sum[node];
		tut[1]=le[node];
		tut[2]=ri[node];
		tut[3]=ans[node];
		return tut;
	}
	array<int,4> tut;
	array<int,4> left=query(node*2,start,mid,l,r);
	array<int,4> right=query(node*2+1,mid+1,end,l,r);
	tut[0]=left[0]+right[0];
	tut[1]=max(left[1],left[0]+right[1]);
	tut[2]=max(right[2],right[0]+left[2]);
	tut[3]=max({left[3]+right[0],right[3]+left[0],left[1]+right[2],0ll});
	return tut;
}

inline void debug(int node,int start,int end){
	cout<<node<<" "<<start<<" "<<end<<" "<<sum[node]<<" "<<le[node]<<" "<<ri[node]<<" "<<ans[node]<<endl;
	if(start==end)return ;
	debug(node*2,start,mid),debug(node*2+1,mid+1,end);
}

int32_t main(){
	faster
	int n;cin>>n;
	string s;cin>>s;
	FOR{
		if(s[i-1]=='C')arr[i]=-1;
		else arr[i]=1;
	}
	
	build(1,1,n);
	
	//debug(1,1,n);
	
	int q;cin>>q;
	while(q--){
		int x,y;cin>>x>>y;
		array<int,4> tut=query(1,1,n,x,y);
		cout<<tut[3]<<'\n';
	}
	
	return 0;
}

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 760 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct

Subtask #2
0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 760 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 47 ms 10324 KB Output is correct
7 Correct 45 ms 10456 KB Output is correct
8 Correct 45 ms 10324 KB Output is correct
9 Correct 42 ms 10332 KB Output is correct
10 Correct 46 ms 10324 KB Output is correct
11 Correct 45 ms 10576 KB Output is correct
12 Correct 50 ms 10580 KB Output is correct
13 Correct 49 ms 10644 KB Output is correct
14 Incorrect 47 ms 10440 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 760 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 47 ms 10324 KB Output is correct
7 Correct 45 ms 10456 KB Output is correct
8 Correct 45 ms 10324 KB Output is correct
9 Correct 42 ms 10332 KB Output is correct
10 Correct 46 ms 10324 KB Output is correct
11 Correct 45 ms 10576 KB Output is correct
12 Correct 50 ms 10580 KB Output is correct
13 Correct 49 ms 10644 KB Output is correct
14 Incorrect 47 ms 10440 KB Output isn't correct
15 Halted 0 ms 0 KB -